Explosive-engine.



J. FVWOOLF.

Y EXPLOSIVE ENGINE.

APPLICATION 1111.213 PEB. 16, 1909.

Patented May 31, 1910.

2 SHEETS-SHEBT 1.

J. F. WOOLF.

. EXPLOSIVE ENGINE. APPLICATION FI'LBD rms. 1e, i909.l

Patented May 31, 1910.

" 2 SHEETS-SHEET 2.

UNITED STATES PATENT oEErcE.

JAY E. WooLE, oE MINNEAPOLIS, MINNESOTA, AssIGNoR Ior ONE-HALE To ELLIS v.'r.

WooLE, or MINNEAPOLIS, MINNESOTAM EXPLOSIVEQENGINE.

Speciuati'on of Letters Patent.

Patented' May 31, 1910.

Application filed February 1G, 1909. Serial No. 478,198.

To all 'whom it may concern:

Beit known that I, JAY F. WooLr, a citizen of. the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Explosive-Engines, of which the following is a specification. My invention relates to explosive engines, and its principal object is to connect the compression andA explosion chambers4 by a directl annular passage-way and to so construct and arrange the piston vand colmections that the piston movements will control the ports to such passage-way and also control the exhaust ports.

My improvements are illustrated in the accompanying drawings, in which- Figure 1 is a central vertical section of an explosive engine embodying my improvements, showing the piston at the limit of its inward movement and showing the port betweenl the charging chamber and transfer passage-way closed; Fig. 2 is a similar view of a portion of the engine showing the piston in position to o en such port to Vpermit the iow of Huid rom the compression chamber through the annular passage-way to the explosion chamber. Fig..3'is a transverse section on the irregular broken line -:vviewed in the direction of the arrows a, showing a bottom view of the cast-ing or casin member that provides the explosion cham er. And Fig. 4 is a transverse section on the line 2 2 of Fig. 2 viewed in the direction of the arrows b, the portv between the charging chamber and transfer passage-way being open.

In the drawings 1, 2, and 3, respectively, represent the parts constituting a suitable casing, providing a compression chamber 4 and' an explosion chamber- 5, and an inter mediate cylinder 6 in which the piston 7 opcrates. The piston is connected by a rod 8 to the crank-pin 9 of the crank-shaft 10 and the usual counterbalance 11 for the crank is provided. An inlet port 12 in the wall of the chamber 4 is controlled by an ordinary spring-actuated check-valve 13; and an exhaust port- 14 is provided in the casing member 3 -which is in communication with an annular passage-way 15 which is open to a circular exhaust chamber 16 formed by a space left between the casing members 2 and 3.. The usual water-jacket space 17 isproglded around thewalls of. the upper chamers.-

The base ofv the casting or casing member 3 being wider' than the cylinder 6 the latter is provided near its outer end with a flange 30 upon whichvthe base of the outer portion of the casting 3 'is seated. Stud llugs 31 formed within they casting have threaded openings 32 to receivebolts'33 that are entered from below through vholes 34 in the flange 30 for securing the parts together.v The exhaust space 16 is thus provided be- -'tween the top 'ot the Vcylinder 6 and the lower end of lthe inner portion of the cast- Within the cylindrical portionl 6 of the casing is arranged a concentric cylinder or 'the sleeve is such that when seated o n the lower stop 21 (as shown in Fig. l) its upper end is fluslrwith the top of the casing member 2, thus leaving the exhaust chamber 16 open to the outlet, and when its up-y per end is in'contact with the stop 22 and the exhaust chamber is closed (as shown in Fig. 2), its lower end will be sufficiently removed from the seat 21 to provide an opening or portv23 between vthe chamber 4 and the annular space 24 intermediate the casing 6 and sleeve 18. This space 24 provides the passage-way or'the iuid' from the chamber 4 tothe chamber 5, and to permit theiiow from ,the passage-way to the latte'r chamber. The upper portion of-the sleeve 18 is provided with numerous openings or ports 25. These openings or ports are provided at points in the sleeve immediately above the location of the head of the piston when the latter is at its lower limitof travel.

The piston 7 consists of .a cylindrical shell open at' the bottom and closed at the top by a head y26 from which the hanger 27 for the connecting rod pin, 28 is suspended.

The outer walls of the piston bodyv may be' vin frictional contact with the inner walls of 12 during the upward stroke of the piston,

and then during the return stroke of the piston the valve 13 is seated by the combined action of its spring and the fluid pressure in the chamber 4, and the compression Aof. the

' fluid continues until the piston reaches the limit of its return stroke, shown in Fig. 1. In that position the chamber 5 is free to exhaust the products of combustion through the chamber 16 and discharge outlet 14. The first eifect then of the next piston re.

ciprocation is to lift the sleeve 18 from its seat and open the port23 between the annular passage-way -24 and the chamber 4 and to move the upper end of the sleeve' toits stop 22 and thereby close the exhaust` passage-way 16, as-shown-in Fig. 2. `When in the latter position the fluid is free to flowy from the chamber 4 through 'the passageway 24 and the valve openings 25 into the chamber 5, and such flow continues until the piston slides within the .sleeve far enough to close the inlet openings or orts 25. The further movementof the piston serves to .compress the fluid in the chamber 5, and when compressed andthe piston has reached the limit of its stroke the ycompressed gaseous charge is exploded in the usual way. Y

Having described my invention, what I elaim and desire to secure by Letters Patent 1. In an explosive engine, the combination with casing members providing compression l and explosion chambers and an intermediate cylinder, of a piston therein separating the compression chamber Ifrom t-he explosion chamber, a sleeve separated from the cylinder by an annular space and slidable on and with the piston and having 'ports past which the piston head reciprocates to control the flow oli-gas through said portsA from said annular space to the explosion chamber, and stops provided on Ithe casing members for limiting the sleeve reciprocations to' permit the piston head. to open said ports near the end of its down-stroke and close them during its up-stroke, substantially as set forth.

tion with casing members providing compression and explosion chambers and a cylinder connecting said casing members and providing a circular exhaust outlet between its upper end and the base 'of the casing of 'the explosion chamber', of a piston located within the cylinder' and casing members and separating the. compression chamber from the explosion chamber, a sleeve slidable thereon and therewith and provided in its 'upper portion with ports past which the piston reciprocates, the sleeve vbeing separated from the body of the cylinder by an annular'luid passage-way and serving, at times, to connect the compression chamber with said 'passage-way and the sleeve ports being in communication with ythe annular passage-way in position to be uncovered by vthewpiston near the end ofits down-stroke to connect thev` explosion chamber with said passage-way, and a stop provided on the casing below said passage-wayffor limiting lthe movement of the sleeve .and cooperating therewith lto shut off the passage-way from the compression chamber on the downstroke of the piston, substantially as set forth.

3. In an explosive engine, the vcombination withcasmg members providing compression and explosion chambers and a cylinder connecting said casing members and providing a circular exhaust outlet between its upper end and the base ofi the casing of the explosion chambenof a piston `located within the cylinder and casing members and separating the compression chamber from the.

explosion chamber, a sleeve slidable thereon sage-way, a stop provided on the casing below said passage-way for limiting the downward movement of the sleeve, and a 'stop provided on the casing above the exhaust and therewith and provided inits upper V outlet for limiting the upward movement of the sleeve and cooperating therewith to close the exhaust outlet at the beginning of the Lip-stroke of the piston, substantially as set forth.

4. In an explosive engine. the combination with casing members providing compression and explosion chambers and a cylinder connecting said casing members and providing a circular exhaust outlet between its upper end and the base of the casing of the ex- 2. In an explosive engine, the combinaplosion chamber, of a piston, a sleeve slidable thereon and therewith to and from VC011- name to this specification in the presenceof tuut with the buse of the casing of the e two subscribing Witnesses this 6th day' 0f plosion chamber, and u rim 011 the cylinder .February l1909.

for guiding the sleeve, whereby the sleeve is 4 JAY F. WOOLF. 5 adapted to open and close the exhaust out- Witnesses:

let, substantially as set forth. JOHN P. MARTIN,

In testimony whereof I have signed rhy CHAS. H. DIXON. l 

